Telephone apparatus



(No Model.) 2 Sheets-Sheet 2.

O. J. SGHWARZE. TELEPHONE APPARATUS.

w m a 6 W M w r w H I m J \wq W 7 w s x n m J w M t 6 a P No. 554,036. I

ANDREW BJRAIIAI. WOTD-UTNUWASHINGTUIIZDC NITED ST TES PATENT OFFICE.

CARL J. SOIIIVARZE, OF ADRIAN, MICHIGAN.

TELEPHONE APPARATUS.

SPECIFICATION forming part of Letters Patent No. 554,036, dated February 4, 1896.

Application filed September 17, I895. Serial No. 562,777. (No model.)

To all whom it may concern:

Be it known that I, CARL J. SCHWARZE, a citizen of the United States, residing at Adrian, in the county of Lenawee and State of Michigan, have invented certain new and useful Improvements in Telephonic Apparatus, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to a telephonic apparatus in which the transmitting, receiving, and signaling devices are all organically combined in a single instrument, and it is the object of my invention to simplify the construc tion and cheapen the cost of manufacture as well as to render the instrument more compact.

In the drawings, Figure 1 is a vertical central longitudinal section through my appa ratus. Fig. 2 is a sectional perspective view with the outer casing removed. Fig. 3 is an elevation of the settingdever, and Fig. 4 is a diagram of the apparatus as in use.

A and A are two permanent horseshoe-magnets, each provided with the segmental polepieces B B. These magnets are oppositely arranged and mechanically secured together by being screwed to the non-magnetic heads 0 O, forming between the cylindrical space D, with the unlike poles of the two magnets on diametrically-opposite sides thereof, and openings E between the like poles.

F are iron rings secured to the magnets A A by the lugs F screwed or bolted to the legs of the magnets. G G are thin iron d iaphragms secured between said rings and the non-magnetic plates H H by means of the screws I. The plates H H are centrally apertured, the former being provided with a speaking-funnel and the latter with a tube K connected by the flexible tube L to the ear-phone or receiver M.

N is a revolving armature mounted upon the shaft 0, passing through the axis of the cylinder D and journaled in the heads 0 O. P P are coils upon said armature connected in series, one terminal being electrically connected to the shaft and through its bearings with one of the line-wires, while the other terminal is connected to the insulated pin Q, extending out from the end of the shaft and bearing against the contact-spring R. The

armature is provided with a drive connection, preferably comprising the crank-shaft S, j our- 'naled in a bearing S formed in the rear end of one of the magnets, the grooved disk or pulley S upon said crank-shaft and the belt S connecting it with the grooved pulley S upon the armature.

T is a head at the end of the armature-shaft, and T is a pin secured eccentrically thereto.

U is a lever fulcrumed at U, being provided at its free end with a finger-piece U T is an arm or connecting-rod pivoted at one end upon the pin T and provided at its other end with the slotted bearing T U is a pin upon the lever U engaging with the slotted bearing T and U is a spring attached to the lever holding said pin against the inner end of said slotted bearing, all so arranged that the pressure of the lever upon the rod T and through the latter on the pin T will turn the armature into the position shown in Figs. 2 and 3, in which the poles stand in the spaces E between the pole-pieces D D and D D and are in proximity respectively to the diaphragms G and G.

V is an inclosing box or casing suitably apertured for the passage of the funnel J, the tube L, the crank-shaft 0 and the lever P.

IV and WV are two insulated spring-contacts secured to the casing V.

X is an insulated block upon the lever U adapted in the normal position of said lever to press the spring-contacts NV and W into contact with each other.

The parts being thus constructed and arranged the instruments are connected into circuit, as shown in Fig. 4 of the drawings, in which a a are two instruments at the opposite ends of the line.

b is the main-line wire and c the ground or return wire.

- e and e are the call-bells.

cl cl are shunt-circuits around the instru-- ments 0. a, each containing two normallyclosed breaks f g and f g, the breaks f f comprising the contacts WV W and lever U, and the breaks 9 g forming the hook upon which the receiver is hung.

To use the instrument,the operator at either 'end of the line-as, for instance, at apresses the finger-key U on the lever U, thereby opening the break f and moving the pin U to the outer end of the slotted bearing T The crank-shaft 5 may now be turned, thereby re- 1 volving the armature-shaft, the rod T sliding freely upon the pin U. The poles of the armature in revolving pass in proximity to the pole-pieces B B and generate an electric current in the coils, which passes over the linewire I), through the belle" and the shunt d to l the ground or return wire 0. The operator then releases the lever U, which is returned by the spring U, pressing the rod T against the pin T and thereby turning the armature into its normal positionthat is, with its poles in proximity to the diaphragms G G. The return of the lever U again closes the break f, but as the operator takes down the ear-phone l M the break 9 is opened. At the same time the person called at the other end of the line I in taking down the ear-phone opens the break I 9. Thus both shunts ti and d are cut out and the only circuit is through the instrument a and a".

Although I have shown and described an instrument provided with a revolving armall ture operating both as a generator for the sig- 1 na-l-current and as transmitter and receiver, l I do not wish to limit myself to this construcl tion, as I believe I am the first to construct a l phone in which transmitting and receiving l diaphragms form the opposite poles of the permanent magnet, with a common inductioncoil between.

\Vith this construction it will be observed the diaphragms although magnetically con nected are acoustically independent of each i other. Thus the deafening sound which would be produced in the ear-phone if a sinl gle diaphragm were used for the double purpose of transmitter and receiver is avoided.

I also desire it to be understood that I do I not limit myself to the precise construction of setting mechanism shown, as I believe the inl vention includes any means of setting the parts in proper relation to each other to con vert the generator into a telephone.

\Vhat I claim as my invention is- 1. In atelephone, the combination with the permanent magnet of vibrating transmitting and receiving diaphragms connected to and l forming respectively opposite poles of said magnet, and an armature between the diaphra-gms and constituting in connection with the magnet and diaphragms transmitting, receiving and signalinginstrumentalities of the telephone.

2. In a telephone, the combination with a magneto-electric generator for signaling, of two vibratory diaphragms, forming respectively parts of the opposite poles of the gen crater-magnet to which they are connected and in conjunction with the armature of said generator constituting the transmitter and receiver. l

8. In a telephone, the combination with a l magneto electric generator for signaling, l

comprising a revolving armature and a vibratory diaphragm adapted in conjunction with said armature, to form a magneto-telephone, of means for automatically setting and normally holding the parts in proper inductive relation to each other to constitute the telephone.

L. I11 a telephone, the combination with a magneto-electric generator for signaling and vibratory diaphragms adapted in conjunction with said generator, to form a magnetotelephone, of means for automaticallysetting and normally holding the armature of said generator with its poles in proximity to said diaphragms.

In a telephone, the combination with a magneto-electric generator for signaling and vibratory diaphragms adapted, in conjunction with said generator to form a magnetotelephone. of an eccentric bearing upon the armature, of said generator, and an arm pressing upon said bearing adapted to automatically turn and normally hold said armature with its poles in proximity to the dia phragms, and a key or lever for releasing said arm.

i. In a telephonic apparatus, the combination with a magneto-electric generator for signaling, a vibratory diaphragm adapted in conjunction with said generator to form a magneto-telephone, an electric circuit in which said generator is included and a shuntcircuit around the generator, of a combined switch and setting-lever adapted when operated to break the shunt-circuit and mechanism actuated by and upon the release of the lever to automatically set and hold the parts in proper inductive relation to constitute the telephone.

7. In a telephone, the combination of two permanent magnets arranged oppositely to each other and forming with their poles a cylindrical field of force in which the poles of one magnet are opposite the like poles of the other magnet, a revolving armature in said field of force provided with an armaturehelix included in the line-circuit, non-magnetic heads secured in the openings between the poles of the magnets and forming bearings for the armature-shaft, two diaphragms connected to the magnets and constituting common north and south poles thereof on opposite sides of the armature, a drive mechanism for the armature and a spring acting I through the drive mechanism to hold the armature at rest in a prescribed position in relation to the diaphragms, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

CARL J SGIIWARZE. Witnesses:

ALEXANDER \VAHLIG, ANNA WAHLIG. 

